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Exhaust temperature frequency limiting protection and control method for air conditioner

A discharge temperature, protection and control technology, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc., can solve the problem of increased operating frequency of compressors, large fluctuations in current power, and affecting user comfort, etc. problems, to achieve the effect of improving comfort, improving outdoor noise and prolonging service life

Active Publication Date: 2017-01-11
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the high-load operation of the air conditioner, when the exhaust temperature exceeds the frequency limit temperature control point, the frequency of the compressor will be reduced, and the exhaust temperature will drop. When the exhaust temperature drops to a certain level, the frequency limit control will be released again. , after the release, the operating frequency of the compressor will increase again, but now many control schemes do not take into account the hysteresis and slowness of temperature changes, so that the frequency limit control is frequently entered and released, resulting in fluctuations in air outlet temperature, system pressure, and current power Large, affecting user comfort and compressor life

Method used

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  • Exhaust temperature frequency limiting protection and control method for air conditioner
  • Exhaust temperature frequency limiting protection and control method for air conditioner
  • Exhaust temperature frequency limiting protection and control method for air conditioner

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Embodiment

[0060] Set the limit temperature A to be 100°C, the exhaust control temperature B to be 90°C, the rapid down-frequency temperature C1 to be 75°C, the frequency maintenance temperature C2 to be 60°C, and the frequency limit release control temperature E is 50°C, the frequency reduction value X is 10 Hz, the first adjustment time T3 is 10 seconds, and the second adjustment time T4 is 20 seconds;

[0061] The actual measured exhaust temperature of the air conditioner is 93°C, which is 90°C higher than the exhaust control temperature and 100°C lower than the limit temperature;

[0062]According to the frequency reduction value, i.e. 10 Hz, reduce the compressor frequency of the air conditioner, and after the compressor frequency is reduced and keep the first adjustment time for 10 seconds, measure the discharge temperature t of the air conditioner again as 87°C is higher than the rapid frequency reduction temperature C1 is 75°C;

[0063] According to the frequency reduction value...

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Abstract

The invention provides an exhaust temperature frequency limiting protection and control method for an air conditioner. The exhaust temperature frequency limiting protection and control method for the air conditioner includes the steps that exhaust control temperature, fast frequency decreasing temperature, a frequency decreasing value and first adjusting time are set, and the exhaust control temperature is higher than the fast frequency decreasing temperature; the exhaust temperature of the air conditioner is detected in real time, and the exhaust temperature and the exhaust control temperature are compared; and the exhaust temperature and the fast frequency decreasing temperature are compared. According to the exhaust temperature frequency limiting protection and control method for the air conditioner, by means of comparison of temperature and time, the buffering time is set, wide-range fluctuation (rise and fall excess) of the temperature or power is effectively avoided, the using comfort of a user is improved, and the outdoor noise is lowered and the service life of a compressor is prolonged while fast stabilization and fast cooling and heating are achieved.

Description

technical field [0001] The invention belongs to the field of air conditioner control, and in particular relates to a method for frequency limiting protection and control of exhaust temperature of an air conditioner. Background technique [0002] During the high-load operation of the air conditioner, when the exhaust temperature exceeds the frequency limit temperature control point, the frequency of the compressor will be reduced, and the exhaust temperature will drop. When the exhaust temperature drops to a certain level, the frequency limit control will be released again. , after the release, the operating frequency of the compressor will increase again, but now many control schemes do not take into account the hysteresis and slowness of temperature changes, so that the frequency limit control is frequently entered and released, resulting in fluctuations in air outlet temperature, system pressure, and current power Large, affecting user comfort and compressor life. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 吕福俊李伟刘伟彤
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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